Abstract:
PURPOSE: A high-pressure catalyst/flame composite combustion type burner is provided to reduce NOx, and to improve the efficiency of the burner by mixing combustion gas and mixed gas by steps. CONSTITUTION: A high-pressure catalyst/flame composite combustion type burner is composed of a first gas mixing unit(1) for mixing preheated air and fuel uniformly, a catalyst burning unit(2) for surface-burning the mixed gas, a second gas mixing unit(3) for mixing the surface-burnt gas and surface-unburnt gas, and a flame burning unit(4) for burning the mixed gas in the second mixing unit.
Abstract:
PURPOSE: A heat exchanger of a catalyst burning type is provided to supply heat to a heat medium by using catalyst reaction on surface of pins. CONSTITUTION: Inorganic composite such as gamma alumina is wash-coated on a surface of a metallic pin for conveniently attaching catalyst. Then, titanium and zirconium are post processed on a catalyst layer. Herein, the surface of the pin is processed in a sand blasting method for wash-coating the catalyst. Then, a pin typed heat exchanger coated by gamma alumina is heated at a temperature of 500deg.C for 5 hours. Then, the pin is dried at a temperature of 120deg.C for 6 hours after coating the catalyst. Burned gas at a first exhaust gas outlet(2) is reacted in a heat exchanger having a honeycomb catalyst for being exhausted. Herein, the exhaust gas includes heat for being used as a pre-heating air of the pin typed heat exchanger.
Abstract:
본 고안은 가연성 가스를 연소시키는 촉매연소장치에 설치되어 있는 확대관에서 가연성가스가 균일한 유속으로 촉매층에 접촉하도록 하기 위한 다공판에 관한 것이다. 유체의 유입관의 단면적과 다공판의 구멍의 전체면적을 일치시켜 다공판을 지난 후의 유속의 전체적인 변화를 없애고, 다공판의 구멍의 위치 또는 크기를 위치에 따라 변화시킴에 의해 위치에 따른 유속의 변화를 제거하였다. 따라서, 촉매연소장치의 확대관에 본 고안인 다공판을 설치하여 촉매층 전단에서 유속분포를 균일하게 하면, 촉매 층을 통과하는 가연성기체의 유속 또한 균일하게 되고, 가연성가스의 연소에 의해 발생된 열이 촉매층 전체에 균일하게 분산되어 국부 가열에 의한 촉매의 비활성화를 억제할 수 있다.
Abstract:
PURPOSE: A heat exchanger of a catalyst burning type is provided to supply heat to a heat medium by using catalyst reaction on surface of pins. CONSTITUTION: Inorganic composite such as gamma alumina is wash-coated on a surface of a metallic pin for conveniently attaching catalyst. Then, titanium and zirconium are post processed on a catalyst layer. Herein, the surface of the pin is processed in a sand blasting method for wash-coating the catalyst. Then, a pin typed heat exchanger coated by gamma alumina is heated at a temperature of 500deg.C for 5 hours. Then, the pin is dried at a temperature of 120deg.C for 6 hours after coating the catalyst. Burned gas at a first exhaust gas outlet(2) is reacted in a heat exchanger having a honeycomb catalyst for being exhausted. Herein, the exhaust gas includes heat for being used as a pre-heating air of the pin typed heat exchanger.
Abstract:
PURPOSE: A low-temperature Nox premix type honeycomb catalytic burner is provided to user heat obtained from combustion reaction in a catalytic bed without making a flame at a burner. CONSTITUTION: A catalytic burner has a gas feed pipe(6) inserted into an air feed pipe(7) behind a burner body(1). A perforated plate(5) is mounted inside the burner body having the air feed pipe and the gas feed pipe. A catalyst storage portion(8) is formed in opposite to the air feed pipe of the burner body to form a catalytic bed(2). A thermocouple(4) is inserted into the lower portion of the air feed pipe to sense catalytic combustion in the burner. An igniter(3) and a pilot burner(11) are mounted under the burner body and are in contact with the catalytic bed to start catalyst combustion in the catalytic bed. Herein, the catalyst is used with one wash-coating gamma-Al2O3 having thermal endurance to a ceramic honeycomb or a metal honeycomb and then dipping Pd/NiO catalyst therein.
Abstract:
The present invention relates to a catalyst forming apparatus using a screw extruder. The present invention comprises: a screw extruder which makes the catalysts of a powder state into the catalyst of a dough state and then extrudes them; and a cutter which cuts the catalysts extruded in the screw extruder into a certain length and shape. The cutter comprises a pair of cutting drums which are rotatably arranged, and successively performs cutting while the catalysts pass between the cutting drums. The present invention enables the catalysts extruded in the screw extruder to be formed into the catalysts of a certain shape while directly passing through the cutter, thereby conveniently forming the catalysts into a pellet shape or a sphere shape.
Abstract:
PURPOSE: A catalytic combustion apparatus with complete uniform flow for a large capacity internal-reforming MCFC(Molten Carbonate Fuel Cell) is provided to maintain uniform pressure distribution of mixed gas and uniform gas flow in branch pipes. CONSTITUTION: A catalytic combustion apparatus with complete uniform flow for a large capacity internal-reforming MCFC comprises a gas mixing part(1), a uniform flow guide section, a complete catalytic combustion section(3), and an exhaust gas supply section(4). The gas mixing part separately supplies and mixes cathode by-product gas(11) and anode air(12) which are produced according to the reforming reaction of MCFC stack outside an MCFC stack vessel(6). The uniform flow guide section has a perforated or branched structure in order to maintain uniform flow distribution of the mixed gas supplied to the MCFC stack vessel. The complete catalytic combustion section completely burns the mixed gas through multi-stage catalysts(31,32). The exhaust gas supply section supplies high-temperature heat and exhaust gas to the MCFC stack vessel.
Abstract:
A successive preparation method of carbon nanotube and a device for the preparation are provided to mass-produce carbon nanotube of uniform size under quantative control, to control the shape of the carbon nanotube easily, and to reduce manufacturing cost by employing ultrasonic oscillation gasification for pulverizing metal catalyst liquid mixture comprising metal catalyst particle and liquid carbon source. A device for successive preparation of carbon nanotube has: a raw material supply device part(1); a gasifying device part(2); a transportation gas supply device part(3); a reaction device part(4); a successive collector part(7); and a vacuum device part(6) which has a sample bottle(78) connected to the successive collector part and a vacuum pump(61) for removal of inner pressure of the reaction device and remained oxygen. The raw material supply device part(1) has a syringe pump(11) for quantative supply of the metal catalyst liquid mixture(12). The drops of the supplied mixture from the syringe pump fall down onto an ultrasonic oscillation plate(21) concurrently with being pulverized to very small particle. The ultrasonic oscillation plate is controlled by separate an ultrasonic oscillation controller(22) that controls the operation time of on/off timer depending on the supplied amount in the supply device. The pulverized precursor is transported to the reaction device part of a high temperature of 600 to 900deg.C by means of a transportation gas(31) which is supplied from the outside. The transportation gas is controlled by a flux controller(32), mixed homogeneously in a mixer(33), and transported to the gasifying device part. The reaction device part has a perpendicular tube(44), a heater(42) surrounding the tube, and a reactor temperature controller(43) for the heater. The reaction device part is equipped with: the successive collector part(7) for successive collecting of the remained particles in the reaction device part and of carbon nanotube which is mainly produced in gas state; and vacuum device part which is combined with the successive collector in order to remove inner pressure of the reaction device and remained oxygen, in perpendicular direction. The successive collector has a screw(75) inside, and the screw is driven by a motor(76) of which velocity depends on the amount of the produced carbon nanotube by means of a motor control device(77). The produced carbon nanotube from the screw is collected in the sample bottle. A preparation method of carbon nanotube comprises steps of: supplying a metal catalyst liquid mixture comprising liquid carbon source and metal catalyst particles after completing the device for successive preparation of carbon nanotube which employs ultrasonic oscillation of automatic control for operation time and operation degree; producing precursor of uniform nano-size having metal catalyst particles, carbon and hydrogen by gasifying for pulverization of the metal catalyst liquid mixture in the ultrasonic oscillation system for automatic control of the operation time and operation degree; and transporting the pulverized nano-size precursor by transportation gas, separating the precursor into carbon, hydrogen and metal catalyst particles, respectively by thermal decomposition, absorbing only the separated carbon particles on the metal catalyst particles, and forming the shape and structure of carbon nanotube by diffusion, and the obtained highly pure carbon nanotube is collected successively in a perpendicular state for successive preparation.
Abstract:
A module type hydrogen reformer is provided to maximize thermal efficiency of the system by direct use of heat generated by catalytic combustion or by supplying heat in a short distance within the reformer and to minimize the size of the hydrogen reformer at the same heat rate. A hydrogen reformer extracting hydrogen gas includes an exothermic device(1) for supplying a mixture of air and fuel for exothermic reaction of catalyst, an endothermic device(3) for supplying a gas mixture for endothermic reaction of catalyst to reform hydrogen, and a device(2) for generating both exothermic reaction as a secondary reaction and endothermic reaction as a primary reaction of hydrogen reforming by utilizing gas mixtures supplied from both the exothermic and endothermic devices.